Using your phone's Bluetooth connection, the Optical Bluetooth Music Receiver let your smartphone's audio play through your stereo system or stand-alone speakers.
A traditional 3.5-millimeter-to-RCA connection accommodates older home theater setups.

Bluetooth Profile: A2DP/IOPT
Apt-x Coding:Support
SBC Coding: Support
Bluetooth Frequency: 2402~2480MHz
Power Charge: 5V/2A
RF Range: 20m
Audio RL Output Spec:
Output Level: 2+/-10% Vrms
Frequency Response: 20Hz~20KHz
Isolation Ratio: -45dB
SNR(nominal,Audio RL):>=90dB
THD(nominal,Audio RL): 0.05% 
Optical Output spec:
Wavelength(nominal): 640~670nm
Optical Power Output(nominal):  -17dBm

For transferrring music stored on a mobile phone/smartphone to a hifi system and surround sound systems via Bluetooth
Wireless audio streaming wirelessly plays back music of the smartphone via Bluetooth on a hifi system
Also suitable for iPhone, tablet PCs and ultrabooks
Digital optical output for perfect music transfer 
Additional analogue output (3.5 mm)
Bluetooth 4.0 (supports A2DP Bluetooth profiles)
APTX/SBC technology: for superior audio quality despite the limited bandwidth with Bluetooth  
Supports sampling rate at 32,41.4,48 and 96 Khz                                                                                          
Support bluetooth A2DP/IOPT profile
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